JPS5822579B2 - Knitted fabric knitting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of knitting a knitted fabric in which warp stitches and weft stitches are mixed in one knitted fabric, and a novel device that can easily perform the knitting.

Conventionally, as common knitted fabrics, warp knitted fabrics consisting of warp stitches and latitude fabrics consisting of weft stitches have been widely used in the clothing field and other fields.

However, these two knitted fabrics have many advantages and disadvantages due to differences in properties such as surface, pattern, basis weight, dimensional stability, bulkiness, elasticity, stiffness, and air permeability. Since knitted fabrics are composed of either warp or weft, they are anisotropic in many respects, such as appearance and physical properties, compared to textiles, which are composed of warp and weft. .

Therefore, in order to combine the respective advantages of warp knitting and weft knitting and to obtain a fabric with less anisotropy like a woven fabric, we created a knitted fabric using warp and weft yarns and a mixture of warp stitches and weft stitches (
Hereinafter, this is referred to as a texture knitted fabric).

This warp knitted fabric is basically already known, and several methods have been proposed so far for mechanically producing it.

However, the current situation is that none of these methods has been successfully put into practical use in terms of productivity and versatility.

On the other hand, some fabrics with weft yarns inserted into warp knitted fabrics and fabrics with warp yarns inserted into weft fabrics have already been put into practical use.

All of these are knitted fabrics made of warp and weft yarns, but only one of the yarns forms a stitch, and the other yarn is simply inserted.

Therefore, the inserted yarn is not sufficiently fixed within the knitted fabric, and when the knitted fabric is pulled, a shift occurs between the knitting yarn and the inserted yarn, or the inserted yarn bends and protrudes from between the stitches, resulting in poor shape stability. Moreover, when the knitted fabric is squeezed or rubbed, the inserted yarn tends to snag or pill frequently.Furthermore, in either the warp or weft direction of the knitted fabric, one of the knitting yarns and the other side is the inserted yarn. Therefore, it has extreme anisotropy in terms of latitudinal tension and bending.

On the other hand, warp knitted fabrics have stitches formed by both warp and weft yarns, so they are extremely useful fabrics that do not have these drawbacks.

The present inventors have previously developed a method and device for knitting a knitted fabric of this type extremely efficiently, and have previously filed a patent application (Japanese Patent Application No. 46-26
No. 29), this technique uses a rotating disk to supply the warp yarns to the knitting needles, and the warp yarns draw a movement trajectory consisting of a C-shaped or Δ-shaped curve. This caused problems in terms of stable operation.

In order to improve this problem, the present invention configures the movement locus of the warp threads to be approximately linear, thereby preventing the warp threads from getting caught in the heads of the knitting needles, thereby improving operational stability and quality uniformity. The purpose is to

In order to achieve the above object, the present invention has the following configuration.

That is, the present invention provides a knitting device in which each knitting needle arranged in parallel on a needle bed is moved back and forth independently and sequentially to form a stitch consisting of a warp and a weft. A warp yarn feeder is provided which allows the knitting needles to move back and forth, and which moves at the same speed and in the same direction as the cam. This is a knitting device for a knitted fabric, characterized in that it is configured to be wound around a knitting needle while drawing a moving trajectory.

Further, the present invention will be explained in detail.

The present invention uses flat or circular knitting in which each knitting needle is implanted in parallel in a stationary needle bed and is operated independently and sequentially by a group of knitting cams that move along the needle bed to form stitches. In a knitting machine with such a mechanism, weft yarns are supplied to each knitting needle from a weft yarn feeder that transfers together with a group of knitting cams according to the conventional supply method, and warp yarns are supplied to each knitting needle by a conveyor belt in the warp yarn feeder that transfers them together with a group of knitting cams. supply

Then, the warp yarns are fed to the same knitting needle or to different knitting needles to knit a fabric consisting of warp stitches and weft stitches.

Furthermore, the present invention can be easily applied to a knitting machine with a mechanism in which the needle bed rotates and the knitting cam group is stationary. In this case, the weft yarn feeder is stationary and the conveyor belt is moved without moving the warp yarn feeder. All you have to do is circulate.

The method of supplying warp yarns according to the present invention is to supply a group of warp yarns warped into a beam to each knitting needle, and the warp yarns are fed in a plane close to the extension line of each knitting needle at the same speed and in the same direction as the group. A circulating conveyor belt contained within the thread body causes the warp threads to perform the same swing-wrapping motion as in a tricot machine.

As long as the belt carries the warp threads, it may be in the form of tape, rope, or chino, and the outside of the belt is provided with hooks such as grooves or pins to hold the warp threads one by one. It is preferable to have the following.

In the present invention, the movement locus of the warp threads being substantially straight means that
As shown in FIGS. 3 and 4, when the warp threads are wound around the knitting needles, they form a substantially ρ shape or a Δ shape.

Note that the movement trajectory in Figure 3 is in the forward direction of the conveyor belt,
Although the movement locus in the figure shows the opposite direction, detailed functions will be explained later.

Next, the present invention will be explained in detail with reference to the drawings.

Fig. 1 shows -flJ of an apparatus for carrying out the present invention. In the figure, the right part is essentially the knitting part of a normal sewing and knitting machine, the center part is the warp yarn feeder, and the left part is the warp beam. It is something.

The knitting needles 2 placed in the needle bed 1 are actuated by a group of knitting cams 3, 4 which move along the needle bed.

The weft yarn X is supplied to the knitting needles from the weft yarn feeder 5 which moves along the needle bed together with a group of knitting cams, while the warp yarn y is guided from the warp beam 6 to the guide plate 8 via the tension bar 7 and then to the conveyor belt inside the warp yarn feeder. 9 to the knitting needles.

A guide plate 8, a rail 10, and a rack 11 are installed parallel to the needle bed, and the warp yarn feeder includes a slider 12 that moves within the rail, a gear 13 attached to the slider, a wheel 14 coaxial with the gear, It consists of a conveyor belt 9 that is circulated by wheels.

Therefore, when the yarn feeder is set at a position related to the same knitting needle as the knitting cam group and moved along the needle bed at the same speed and in the same direction, the knitting needle is projected from the needle bed by the cam 3 and guided to the guide plate. (The warp yarns y are sequentially conveyed by a conveyor belt and wound around the knitting needles, and the weft yarns X are sequentially supplied to the knitting needles from the weft yarn feeder.

Next, the knitting needles are drawn into the needle bed by the cam 5, and warp stitches and weft stitches are formed simultaneously.

Here, the action of the warp yarn feeder will be explained.

In FIG. 2, each warp yarn y is guided at equal intervals on a guide plate 8, and the upper end of the guide plate is set at the head surface of 20 knitting needles protruding from the needle bed.

Further, two parts of the conveyor belt 9 are provided close to and parallel to the guide plate in a state of protruding from the upper end of the guide plate, and are set at approximately right angles to the knitting needles.

Therefore, when the slider 12 is moved in the direction of the arrow, the gear 13
is rotated by the rack 11, and as the wheel 14 coaxial with the gear rotates, the conveyor bell I-9 in contact with the wheel moves horizontally while circulating in the direction of the arrow.

Then, the warp yarns y placed on the guide plate are sequentially placed on a conveyor belt that circulates in the direction of the arrow, drawing a movement trajectory Q shown in Fig. 3, and the warp yarns jump over one knitting needle and transfer between it and the next knitting needle. I will do it.

The warp threads are thus wound between the hooks and latches of the knitting needles and placed on the guide plate again.

In the embodiment shown in FIG. 3, the conveyor belt 9 is moved from A to B to C.
In order to wrap the warp threads around the knitting needles by moving as shown in D through Distance dl: Diameter d2 of the gear 13: Diameter of the foil 14, and when the warp yarn feeder moves by tl, the belt is C2
It moves the warp thread y by one stitch, that is, by t, and winds the thread past the knitting needle 2, and if the required rotation angle of the gear 13 at that time is θ, then Become.

Therefore, in order to move the warp yarn y by one stitch in the direction opposite to the direction of movement of the warp yarn feeder as shown in the trajectory Q shown in Fig. 3, (2a+b)-C1-t...
1) It is necessary to satisfy the following relationship, and the warp y
In order to move by one stitch in the same direction as the moving direction of the warp yarn supply body, each part of the warp yarn supply body may be designed to satisfy the following.

For example, a design that satisfies equation (1) is: t=2mm, a=10wn, b=l Oynm, h=
If we predetermine 7.5 h, θ/360=1/3, then t,
=20+IO-0-2=28 is obtained.

FIG. 4 is a specific example when b=o in the embodiment of FIG. 3.

In this case, the conditions necessary for the design according to Fig. 3 are as follows.In order to move the warp yarn y by one stitch in the direction of movement and reaction of the warp yarn feeder, 2a-C1=t...・・・・・・(
2) To move the warp yarn y by one stitch in the same direction as the transition of the warp yarn feeder as shown in the trajectory Q' shown in FIG.
2a-t・・・・・・・・・(2)
'.

In all of the above embodiments, the conveyor belt 9 is configured to be endless and circulate, but it does not necessarily have to be endless and can be used in cases where the moving direction of the warp yarn feeder alternates, for example in a flat knitting machine. For applications such as this, a method of alternately winding in one direction may also be used.

In the present invention, knitting efficiency can be improved by appropriately arranging a plurality of yarn feeders that transfer the warp yarns in the opposite direction to the movement of the yarn feeder and a plurality of yarn feeders that transfer the warp yarns in the same direction as the movement of the yarn feeder. can be improved.

Further, in the present invention, a plurality of yarn supplying bodies can be shared by one conveyor belt.

Furthermore, if some of the knitting cam groups corresponding to a plurality of yarn feeders arranged in the same needle row in correspondence with individual knitting cams are made to have no effect on the knitting needles, the warp yarns can be moved by the yarn feeders. It is also possible to move only on the guide plate without forming any stitches.

Also, there is a part where only warp stitches are formed without feeding the weft to the knitting cam group corresponding to the warp yarn feeder, and a part where only the weft stitch is formed by feeding the weft yarn to the knitting cam group where no warp yarn feeder is arranged. can also be provided as appropriate.

Therefore, by the arrangement and combination of the warp yarn feeder, the weft yarn feeder, and the knitting cam group in this way, knitted fabrics with various textures consisting of warp stitches and weft stitches can be obtained.

Next, the role of the guide plate 8 will be described.

The guide plate 8 is provided between the knitting needles 2 and the warp yarn feeder, and the guide plate 8 is provided between the knitting needles 2 and the warp yarn feeder so that each warp yarn is accurately positioned between the knitting needles so that each warp yarn is wound around each knitting needle accurately. and the warp yarn feeder and fixed perpendicularly to the knitting needles as shown in FIGS. 1 to 4.

If the warp threads are not in the middle of each knitting needle, the warp threads will hit the knitting needles when passing between the knitting needles, and if the warp threads are too far from the back of the knitting needles, the warp threads may hit the knitting needles when passing in front of the knitting needles. If the warp threads are too close to the back of the knitting needles, the wrapped warp threads will not enter the knitting needle hooks accurately.
(・There is no benefit in using curly eyelashes that have good alignment.)

Taking these points into consideration, in the present invention, a groove is formed on the upper edge of the guide plate 8, and the position of this groove corresponds to the middle of the knitting needle, and is perpendicular to the knitting needle, and is aligned with the bottom line of the groove and the needle bed. If the warp threads are fixed so that they are parallel to the end faces of the threads, the warp threads will always fit into the bottom of this groove and move to the correct position.

The shape of this groove should be determined by taking into consideration the movement axes Q and Q' of the warp threads.

Since the present invention has the above configuration, it has the following features.

First, in the present invention, as shown on the left side of FIGS. 3 and 4, the warp movement trajectories are Q (/'1 type) and Q' (
Since the warp threads can be drawn in a △-shape), it is possible to significantly reduce the possibility of the warp threads coming into contact with the knitting needle heads and causing poor winding when the warp threads are wound around the knitting needles.

In addition, with this trajectory, the warp needs to be raised to a small height, which reduces warp tension fluctuations during winding, which allows stable knitting, and allows the use of weak yarns, low elongation yarns, etc. be able to.

Furthermore, the present invention can be applied not only to flat knitting machines but also to circular knitting machines, and there are cases in which a cam is moved and a needle bed is moved in order to operate the knitting needles on the needle bed. Can be applied.

In addition, in an embodiment in which a plurality of warp yarn feeders are arranged on the same needle bed, any warp yarn feeder may be suspended, any weft yarn may be unsupplied, or other various combinations may be used. It has the feature that knitted fabrics with various textures can be obtained using the same device.

Furthermore, since it can be carried out by partially modifying an existing knitting machine, the equipment cost can be reduced.

Additional related application is between nuclear power plants [Patent No. 869273 (Special Publication No. 51-4
4226)], a conveyor belt was used instead of the rotating disk.

[Brief explanation of drawings]

FIG. 1 shows a knitting device according to the present invention. FIG. 2 shows a warp yarn feeder according to the present invention. 3 and 4 illustrate the form of the conveyor belt according to the present invention. X: weft, y: warp, 1: needle bed, 2: knitting needle, 3° 4: knitting cam, 5: weft yarn feeder, 6: warp beam, 7: tension bar, 8 guide plate, 9: conveyor belt, 10 :
Rail, 11 Ni rack, 12 Ni slider, 13: Gear,
14: Wheel, Q, Q': Warp trajectory.

Claims (1)

[Claims] 1 In a knitting device that independently sequentially moves knitting needles arranged in parallel on a needle bed to form a stitch consisting of warp and weft, a cam moves relatively on the needle bed to move the knitting needles on the needle bed back and forth. A warp yarn feeder is provided which moves at the same speed and in the same direction as the cam, and the warp yarns draw a substantially linear movement trajectory by a conveyor belt built into the yarn feeder. A knitting device for a knitted fabric, characterized in that it is configured to be wound around a knitting needle.